Adjustable metering liquid dispenser

Abstract

A liquid dispenser adapted to fit over the open top of a container has a pump plunger connected by valving between a depending inlet and an outlet for pumping liquid from the container and a limitedly movable gauge rod is disposed in spaced parallel relation to the plunger with means securing the plunger and rod together in adjustable longitudinal relation to thereby adjustably fix the plunger stroke for metering fluid dispensed per stroke of the plunger.

What is claimed is: 
     
       1. In a liquid dispensing device having a cap structure adapted to engage the open top of liquid container and including a pump having a vertically reciprocal plunger extending upwardly through the cap, the improvement comprising: said cap structure including a lateral floor with an angular depending flange thereabout adapted to engage the open top of a container and a lower plate disposed contiguous to said floor beneath same,   said pump including a pump cylinder depending from said cap structure and connected thereto with said pump plunger slidably engaging said cylinder and extending above said floor through aligned openings in said floor and lower plate,   a longitudingly movable gauge rod with markings along the length thereof disposed in spaced parallel relation to the said pump plunger,   means connecting the portion of said plunger extending through said cap to said gauge rod in adjustable sliding relation longitudingly of said plunger,   a tube having a closed lower end and an open upper end threaded into said lower plate from the bottom thereof at an opening through said lower plate aligned with an opening through said floor,   an annular member disposed beneath said plate above said tube and having a central opening there through slidably accepting said gauge rod in extension through said floor and lower plate, and   a collar about said gauge rod adjacent the lower end thereof and adapted to engage said angular member upon upward movement of said gauge rod to thus limit the longitudal movement of said gauge rod,   whereby adjustable longitudinal positioning of said gauge rod relative to said plunger predetermines the maximum stroke of said pump plunger to set the volume of fluid dispensed by each full reciprocation thereof.